Diamond



FIG. 1 is a perspective view of the diamond showing our new design;

FIG. 2 is a perspective view of the diamond;

FIG. 3 is a bottom view of the diamond;

FIG. 4 is a front view and a rear view of the diamond, the front and the rear views are identical;

FIG. 5 is a top view of the diamond; and,

FIG. 6 is a left side and a right side view of the diamond, the left side and right side views are identical. 

CLAIM The ornamental design for a diamond, as shown and described. 